CHEYENNE, Wyo. (AP) – A federal judge Friday struck down a Clinton-era ban on snowmobiles in Yellowstone and Grand Teton national parks – a move expected to leave the parks open to the vehicles for at least the next three winters.

U.S. District Judge Clarence Brimmer ruled that the ban – aimed at preventing air and noise pollution and protecting wildlife – was imposed without adequate participation from the public and the states of Montana and Wyoming.

The 2001 rule was “the product of a prejudged, political decision to ban snowmobiles from all the national parks,” Brimmer said.

National Park Service officials are already drafting new rules for the next three winters. The tentative plans call for up to 720 guided snowmobiles a day in Yellowstone this winter, and 140 per day in Grand Teton and the highway that connects the two parks.

Wyoming Gov. Dave Freudenthal praised the judge’s decision, saying it recognized “the fundamentally unfair nature of the ban and ensured that citizens will get to see their national park.”

But Abigail Dillen, an attorney for some of the conservation groups that sued, said she was disappointed and that the groups were studying their legal options.

Before the Clinton-era ban could take full effect, the Bush administration issued permissive new rules allowing Yellowstone to have up to 950 snowmobiles and Grand Teton up to 190.

But a federal judge in Washington, D.C., overturned the Bush rules and reinstated the Clinton ban for the remainder of the winter of 2003-04.

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